DE2056072A1 - Thermostatically controlled mixing valve for hot and cold water - Google Patents

Description

Anciens Etablissements Queroy, 10/14 rue Tolain, Paris

Thermostatically controlled mixing valve for hot and cold water

The invention relates to a thermostatically controlled mixing valve for hot and cold water, which has the possibility offers to automatically maintain a previously determined water temperature. In particular, the invention relates to Mixing valves, in which the organjg is used to set a certain mixed water temperature from an expansion tank consists, which changes under the influence of heat and which is arranged in the interior of a mixing chamber is that according to the operation of the expansion tank, a cylindrical slide is moved, the Inlet openings for the warm and cold water more or less covers or releases.

In known mixing valves of this type, the expansion member acts on a fixed but adjustable abutment, its Changes in position have an effect in the axial direction and in this way make it possible to achieve a desired mixed water

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temperature to be set. Such known valves have a relatively complicated structure, which of course increases the price. Another shortcoming of the known valves is that they do not provide the possibility of to change the outlet of the mixed water set in its temperature and therefore additional taps or valves must be provided that control the water outlet. With certain mixing valves one already has two regulating taps seated on a housing are provided. This increases the technical effort and makes operation difficult. Because the axes of rotation of the various mixer taps run in different directions, it is necessary to reach for different places when adjusting the valve.

In contrast, the invention is based on the object of creating a thermostatically controlled mixing valve, which is simple in its structure and therefore cheap and especially easy to use. this is achieved according to the invention that the water outlet with the help of a second, concentric to the first Slider arranged cylindrical slide is adjustable, with one for its axial displacement rotatable sleeve is provided on the valve body while regulating the temperature of the mixed Water, a rotary knob sits on the valve, the rotation of which causes an axial adjustment of the organ, against which the expansion body is supported.

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Further details and advantages of the invention Mixing valves are explained in the following description using an exemplary embodiment. In the enclosed Drawings show:

1 shows an axial longitudinal section through the mixing valve,

Fig. 2 is a section along the lines II-II Fig. 1,

3 shows part of an axial section around the safety system of the mixer tap and

Fig. 4 is a further partial view in section of another Mixing valve detail.

The valve housing 1 of the mixing valve has two openings 2a and 2b, one of which is the inlet for the cold water and the other the inlet for the heat Water forms.

The two openings 2a and 2b lead into two annular chambers 3a and 3b and can be at any point on the perimeter the annular chambers 3a and 3b be arranged.

Inside the housing 1 is a screwed into the housing sleeve 4. It takes the control element for the Temperature setting of the mixed water. This essentially consists of an expansion tank5 that is filled with a suitable substance, which expands under the action of heat, in this way the axial To cause displacement of a stamp 6, which is on the

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Container 5 is seated. On the other hand, the container 5 sits with a collar 7 in a corresponding recess 8 in one end of a cylindrical insert 9. This has the task of opening the inlet for hot and cold water to control.

The insert 9 leads with its upper part 9a in Inside the sleeve 4, while the lower part 9b, however, below the lower edge 4b of the sleeve 4 directly is in the housing 1.

In part 9a of the insert 9 are immediately above a shoulder 11 formed on the upper edge of the part 9b or several openings 10 are provided. These are at the level of the cold water inlet 2a, 3a.

As the construction shows, the insert 9 has only a small amount of play, which is limited in one sense by the lower part 9b, which is supported against the bottom 1b of the housing 1. In the other sense, the Bounded by the shoulder 11 which abuts against the lower edge 4b of the fixed sleeve 4.

In the illustration according to FIG. 1, the insert 9 is in its highest position, in which it is with the Shoulder 11 rests against the lower edge 4b of the fixed sleeve.

In this position, the openings 10 are in the insert 9 inside the fixed sleeve 4. This provides cold water access to the inside of the mixing chamber, which is in the interior of the insert 9 is formed, locked. On the other hand, the warm water, which in the annular chamber 3b through

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the opening 2b enters, pass under the lower edge of the insert part 9b away into the mixing chamber. This is possible because in this position of the parts of the insert 9b with its lower edge from the bottom Ib the housing is lifted.

On the other hand, however, causes a displacement of the insert 9 in the direction of arrow F to the ßehäuseboden out that the openings 10 are more or less released, so that thereby the inlet for the cold Water is released and this can be located in the mixing chamber. At the same time, of course, the entry for the hot water reduced to the same extent and finally shut off completely when the insert 9 is with his lower part 9b touches the bottom Ib of the housing 1. In this case the maximum cold water inlet is given, as Fig. 4 shows.

A spring 12 in the interior of the insert 9 tries to continue to push the insert into its highest end position, as shown in FIG. 1. A single sealing ring 15 $ prevents on the periphery of the insert 9 that hot and cold water can directly flow together.

Just below the recess 8 of the collar 7, the upper portion 9a of the insert 9 a number of openings \ k, for the exit of the mixed water from the mixing chamber 9 in use. The openings Ik are at the same height as corresponding openings in the fixed sleeve 4.

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In the just described area of the openings 14 and 15, the valve housing 1 has an outlet 16 through which the mixed warm and cold water is discharged to the outside will. Finally, however, a weatherable sleeve 17 is provided with which the mixed water outlet can be regulated. It sits at the level of the openings 15 between the fixed sleeve 4 and the housing 1 or the outlet channel 16. In the following, however, the assembly and mode of operation of the insert 9 will first be described will.

As FIG. 1 shows, the expansion vessel 5 sits inside the upper part 9a of the insert 9, with a correspondingly large annular space remaining around it, which allows the mixed hot and cold water / L to pass through the mixing chamber to the outlet openings 14 and 15 allowed.

The mixed water washes around the expansion vessel 5 on all sides so that the respective water temperature is transferred to the expansion vessel in a very short time.

The upper part of the expansion tank 5 is of a Insert 18 enclosed, the opposite of the expansion tank 5 or the sleeve 4 by the two ring seals 19 and 20 is sealed. The insert 18 lies with its upper edge against a shoulder 21 in the interior the sleeve 4.

The stamp 6 placed on the expansion vessel 5 is verssben with a plate 22, the i.12 inside a cylinder 2? can slide up and down.

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Inside the same sits a compression spring 24, which is on the one hand on the cylinder bottom and on the other hand on the Plate 22 is supported and this against a snap ring or a support 25 in the thickened edge 23a of the Cylinder 23 pushes.

The lower edge 23a of the cylinder 23 is on its Polygonal circumference, for example designed as a hexagon. He guides himself in the corresponding area 4c of the fixed sleeve 4, but cannot twist.

The cylinder 23 sits with its upper part in a cap 26, which by means of the flat thread 27 into the interior the sleeve 4 is screwed in. It can be opened with the help of the button located on the top of the valve Turn knob 28 about its own axis to regulate the temperature of the mixed water in this way.

On its upper side, the cap 26 has a centrally arranged pin 30 of preferably rectangular cross-section. On this pin sits a cone 29 with / a hole corresponding to the pin cross-section, so that the cone 29 can move axially on the pin 30, which is rectangular in cross section, but cannot be rotated.

On the top of the cone 29, the control button 28 is placed, which for this purpose on its underside has a conical recess. The cone 29 is on its upper side with longitudinal grooves, or. Notches or bumps provided which enter corresponding grooves or depressions in the button 28, so that both parts can only be rotated together. Closing

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The button 28 has borrowed in a transverse direction Slit a fork-shaped slide 31 and the cone 29 at the level of this slide 31 below a neck-like twist in his head. Once the Slide 31 from the side into the associated slot of the button 28 is inserted, it encompasses the upper part of the cone 29 and thus secures both parts against loosening their connection (Fig. 2).

On the other hand, the cone 29 has at its lower end a circumferential plate-shaped edge with a Bund that carries an intermediate sole 33.

so upwards the part 29 ii & d the button 28 is through a threaded cap screwed on the sleeve 4 from above 32 secured., Which the> widened edge of the Cone 29 covered,

By turning the knob 28 in one direction or the other, the cap 26 is rotated via the moving cone 29, which as a result of the thread 2? moves upwards or downwards in the axial direction, the pin 30 only being displaced in the cone 29 in the axial direction. The downward movement of the cap 26 causes an axial displacement of the cylinder 23 * 23a in the guide 4c of the sleeve k. The spring 24 acts on the plate-shaped head 22 seated on the pin 6. In this way, the entire control mechanism is moved downwards in the direction of the arrow F in FIG.

As will be described in detail in the following, the exact temperature is determined by this shift

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of the water to be mixed. Any rotation of the knob 28 to one side or the other causes it a change in the respective temperature setting of the mixed water.

On a scale ring 34 surrounding the button 28, for example is made of plastic, the setting can be read off. The ring 34 can for this purpose a Carry out exact scale graduation or other suitable indications of the water temperature.

On the underside of the scale ring 34 there are lugs 34a Distributed over the circumference, provided through which radially extending pins J56 are guided, which in corresponding Surround the bores of a screw ring 35, which is screwed onto the outside of the threaded ring J52 is. The ring 35 can be tightened so far that he sits immovably on the part 32.

Finally, there is also a safety device in the mixing valve provided, which prevents the set water temperature from undesirably increasing greatly increased, which can be dangerous. This safety device consists essentially of a radially in a bore 38 of the button 28 displaceable push button 37, one end of which protrudes only a little beyond the circumference of the button 28. On a firmly in the The pin 40 inserted into the button 28 is guided by a compression spring 39 which is pressed against the inner end of the button 37 applies. The button 37 is flattened inside the guide 38 and provided with a recess 41 (FIG. 1). The pin 40 extends through the wall 37a of the button 37

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through and has a thickening 42 at its end, by means of which the button 37 is secured against accidentally slipping out of its guide 38.

In the bottom of the recess 4l, the button 37 has one Slot 43, in which a cylindrical pin 44, which sits on the pin 30, engages.

In the setting of the mixer tap for cold water, the cap 26 is screwed completely down. she has is at least so far away from the stop 33, as it corresponds to the length of the pin 44, which has thus emerged from the slot 43 of the button 37 1st (Fig. 3). In this position, the spring 39 pushes the button 37 outwards into its extreme end position, so that it protrudes from the control button 28 correspondingly far. This taking place in the direction of arrow F '(Fig. 1) Movement of the button 37 is limited by the stop 42 on the pin 40. Will in this The moment the control button 28 rotates in the sense of an increase in the temperature of the water, it hits Pin 44 against the underside of part 37a on button 37, whereby further adjustment is blocked. It no water temperature can be set that exceeds a certain limit value.

However, in order to get hotter water, it is only necessary to turn the button 37 in the opposite direction to the arrow F. in Fig. 1 into the control button 28 to be pressed. The button 28 can then be moved without difficulty rotate, because now the pin 44 is again in the area of the recess 43 and with further rotation of the button 28 can enter this. This allows the cap 26 to be shifted upwards and thus a

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Release of hot water access. When finally the Cap 26 strikes against the limiting disk 33, corresponds this is the highest attainable temperature (Fig, I).

The safety device described can be set for a very specific limit temperature of the water. This can be, for example, 40 ° Celsius. However, it is also possible to use any other limit value to adjust.

As was said at the beginning, it is an essential one Feature of the invention that there is also a device in the mixer tap that allows it to be independent to change the outlet of the mixed water from the temperature control. The is already used for this Above-mentioned cylindrical sleeve 17, which is concentric to the insert 9 between sleeve 4 and housing 1 at the level of the Water outlet 16 is provided. It is turned out conically at its lower edge 17b and can focus on a Put on the ring seal 45, so that a completely can achieve tight seal of the water outlet. With a ring 46 placed on the insert 4, the Ring seal 45 held in a rotation of the sleeve 4. When assembling the mixer tap, the sleeve 4 is only screwed tightly into the housing after previously the ring 46 pushed on and the die ring 45 inserted became. The height of the locking ring 46 results in a compression of the sealing ring 45 as soon as the sleeve 4 is screwed correspondingly far into the housing 1. It can then no longer be lost. The assembly of this Sealing ring 45 represents an essential feature of the Invention because it is important that the sealing ring is always properly in place.

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In the in Pig. In the position shown in the drawing, the sleeve 17 is firmly seated with its lower, turned-out edge 17b on the sealing ring 45, so that the water outlet 16 is locked. In order to open the outlet again, it was sufficient to reverse the sleeve 17 towards the top to move to arrow F.

This is caused by the fact that the sleeve 17 has a thickened edge 17a at its upper end, which forms a thread and with which the bushing leads in a thread 47, which on the inside of a Operating ring 48 is provided. Preferably arrives here again a flat thread is used. To an axial displacement of the sleeve 17 when rotating the To reach operating ring 48, it is necessary to the To prevent ring 17 from rotating about its own axis. This is done by having the sleeve on its inside has an angular, for example a hexagonal shape, with which it adapts to the correspondingly designed Outside 4d of the insert 4 leads. However, other means can also be provided, one axial Allow displacement of the sleeve 17, but prevent its rotation.

A rotation of the sleeve 48 in one sense or the other causes a corresponding displacement of the locking slide 17. In order to achieve a gradual regulation of the water outlet, the outlet / opening 15 is on the Outside of the insert 4 is provided with a bevel 15a, so that the opening 15 is towards the outlet channel expanded towards.

Located at a maximum opening of the water outlet the gate valve 17 at the upper end of the thread 47,

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abutting a cylinder 49, which the insert 4 surrounds.

The rotatable sleeve 48, the change in the water outlet serves, lies with its upper edge against the screw connection 35 already mentioned. It is A sliding ring 50 is inserted between the screw connection 35 and the upper edge of the sleeve 48. Also has the fixed scale ring 34 is elastic on its underside Sealing lip 34b with which it rests against the upper edge of the sleeve 48 in order to avoid impurities and prevent foreign bodies from entering the mixer tap. In addition, the slide 17 is on its outside sealed with respect to the housing 1 by an elastic sealing ring 51, which in turn passes through a shim ring 52 is held.

As can be seen from this, the mixing valve according to the invention has a thermostatic control for the mixed water and also a device for regulating the discharge of water, all of the various elements are housed inside the mixing valve, and in the same axial direction or concentric to one another lie.

The two operating elements that are available for the two operations consist of the control button 28 and the rotatable sleeve 48. Both rotate about a common axis. Under these circumstances, the invention has Mixing valve has a compact structure in contrast to known mixing valves. Because the two Controls are arranged close together, leave the various settings can be carried out in the simplest possible way.

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The working principle of the mixing valve just described is as follows:

1. When the initial setting of the desired mixed water temperature is performed before the If the water outlet is open, there are two possibilities:

a) According to this handling, the abutment 22 for the stamp 6 of the expansion vessel 5 in are in a position that allows the punch 6 to give way to a certain extent. At the moment when the water leaks is opened by rotating the sleeve 48, the warm water flows from the bottom of the "Valve out into the mixing chamber because the slide 9 through the spring 12 is lifted and releases the hot water inlet. The expansion vessel 5 is in this case one Exposed to heating, which the expansion of the material contained in the expansion vessel, for example Wax, causes. As a result, the plunger 6 of the expansion vessel is opposed in one direction move to arrow F and hit the abutment 22. However, this remains under the action of the spring 24 in its fixed position. As a result, the expansion tank will move itself down in the direction of arrow F. move while taking the slide 9, which finally closes the inlet of the warm water and in contrast, allows the entry of cold water. The cold water now flows into the mixing chamber and causes the filling of the expansion vessel to contract 5, which causes the slide 9 to rise again under the action of the spring 12. To this Way, warm water can enter the mixing chamber again

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After a few up and down movements of the slide, the movement of the expansion vessel will stabilize to a certain extent 5 and the slide 9 so that the slide is finally in an intermediate position remains that between jjfeiner complete release and a complete closure of the warm water lies. This will set the ratio of the incoming cold water to the The amount of warm water flowing in is precisely defined so that a certain temperature is maintained can. The level of this temperature depends on the setting given to the abutment 22.

b) According to the original setting, it is it is also possible that the abutment 22 rests directly on the stamp 6 of the expansion vessel. In this If the plunger 6 would be moved in the direction of arrow F, so that the contained in the expansion tank Filling compressed (low temperature area). Finally, the abutment 22 comes into the position which corresponds to the desired temperature. While the slide 9 remains in the previous setting, in which the hot water inlet is open. If at this moment by turning the sleeve 48, the water outlet opened, the effects are the same as those described previously.

However, it can also be that the temperature inside the mixing valve is higher than the actual temperature desired temperature. This case can occur if, for example, a water temperature of 45 ° .Celsius has set and then another user wants a lower temperature of about 35 ° Celsius. if in this case the control button 28 in the sense of the low

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Temperatures is rotated and the outlet remains closed, so the part 22 is caused to the punch 6 of the expansion tank and not to push it forward. The spring 24 is then compressed and since the tension of this spring is greater than that of the spring 12, the abutment 22 is the complete Closing the hot water inlet at Ib and the complete causes the cold water inlet to open at 4b.

If at this moment the water outlet is opened again by turning the sleeve 48, it flows first cold water after what the capsule 5 of the expansion tank cools and contracts. The stamp 6 acted upon by the spring 24 then enters the expansion tank until finally the abutment 22 rests on the stop 25.

Exactly at this moment, the spring 12 comes into effect again, in the opposite direction to the arrow direction F, wherein the ram 6 is put under pressure again. Finally, the hot water inlet is released again, see above that from this moment on the effects described above are repeated until the desired ^ mixed water temperature is reached.

2. If the temperature of the water in the mixing chamber increases during operation, it will cause this is an expansion of the expansion vessel 5. The consequence of this is again an actuation of the slide 9> to change the ratio of hot and cold water until the desired temperature is reached again.

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If, on the other hand, the water temperature drops during operation, the effect is complete exactly reversed.

J5. In addition, it is also possible during operation of the mixer tap to change the water temperature. This is done simply by the fact that the control button 28 is adjusted to the right or left in the sense of the desired change.

4. Finally, it is also possible that the abutment 22 is immovable while the mixing valve is working remain. This is the case when the force of the spring 24 is a little greater than the compressive force that causes the Expansion vessel 5 exerts on the movable plunger 6. Then the mixer tap remains fully effective without the aid of the spring 24.

If the desired water temperature at the outlet is higher according to an expansion of the stamp 6, and if you finally want a lower temperature or even cold water, it is sufficient to press the stamp 6 back by turning the control knob 28 in the desired direction.

This maneuver causes compression of the in the expansion tank contained substance. A sudden sharp turn of the control knob 28 could damage it of the expansion tank 5. Therefore the spring 24 is provided which dampens all these movements and prevents any damage to the expansion tank.

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5. Another advantage is that the design of the valve reduces the stresses caused by the The pressure of the warm water or cold water is released will.

Finally, it should be noted that the mixing valve according to the invention is not limited to the single embodiment shown. Rather, it is possible on that Mixing valve to make various changes.

Likewise, the safety device, the turning of the control knob 28 in a certain sense to prevent, replace it with other facilities. The same applies to the expansion vessel 5 * which through other suitable organs which expand under the influence of heat can be replaced. The ones just described Allow advantages of the mixing valve according to the invention numerous uses for this. The mixing valve is primarily intended to be used in sanitary systems to equip such as sinks, showers, baths or other sanitary facilities.

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Claims (5)

2 O R R Π 7 Claims y Thermostatically controlled mixing valve with an expanding under the influence of heat in the mixing chamber for hot and cold water arranged expansion body that acts on a cylindrical slide, which regulates the hot and cold water inlet and is against a fixed but according to the desired Water temperature adjustable member supports, characterized in that the water outlet (l6) with Can be regulated with the aid of a second cylindrical slide (17) arranged concentrically to the first slide (9), wherein a sleeve (48) rotatable on the valve housing (1) is provided for its axial displacement, while To regulate the temperature of the mixed water, a rotary knob (28) sits on the valve and can be turned causes an axial adjustment of the member (25) against which the expansion body is supported. 2. Mixing valve according to claim 1, characterized in that the control slide (9) for the ratio of warm and Cold water is guided displaceably in a housing (4) fixed to the housing, which is provided at the level of the housing (l) Water outlet (l6) one or more passage openings (15) for the mixed water, while the control slide (17) for the water outlet between the bushing (4) and Housing (l) is switched on. 3. Mixing valve according to claim 2, characterized in that for the purpose of watertight closure of the water outlet (16) on the outside of the bushing (4) fixed to the housing 1 Ü b 8 z; / i / _: 7 0 205R072 elastic sealing ring (45) placed and by means of a Retaining ring (46) is held, the control slide (17 ') firmly in its final position attaches the sealing ring (45). 4. Mixing valve according to claim 1 - 3> characterized in that the one sitting on the expansion vessel (5) The stamp (6) is supported on the member (23), preferably with the interposition of a spring (24), which in turn rests in a cap (26) screwed into the bushing (4) fixed to the housing, which by means of the temperature control button (28) is rotatable and thus axially displaceable. 5. Mixing valve according to claim 4, characterized by a safety device that prevents the unwanted setting a too high water temperature and which essentially consists of a transverse in the temperature control knob (28) slidable push button (3?) with a provided therein Slot (43) and from one on the journal (30) the screw cap (27) seated pin (44), which work together in such a way that when turned down the screw cap (23) for the purpose of lowering the temperature in the lowest position the pin (44) emerges from the slot (43) of the push button (37) so that the button (37) is pressed into its locking position under the action of the compression spring (39) and thus through When the pin (44) is on the underside of the push button, the screw cap (23) is turned back for the purpose of increasing the temperature is prevented until the push button (37) against the spring action (39) into the control button (28) is pressed in and in this position the pin (44) can enter the slot (43). 1 Ü 9 8 I 1 / y A 7 0 Le e rs e te